1. The problem statement, all variables and given/known data An oil drop is charged negatively. How much charge is on the drop if the Electric Field is 6,400 N/C at a distance of 1.2 m? 2. Relevant equations E=k q/r^2 I don't know if I should be using that equation for this one. 3. The attempt at a solution I tried to do E/(k x r^2) = q but that didn't work I also tried E/r^2= q but that also didn't work I know the answer has to be 1.3 x 10^3 Thanks in advance for all the help!